Though I am not a spokesperson.. that’s just my opinion.  

I’m happy to offer an hour as an option because I know that seeing providers can quickly become cost prohibitive and that many people are short on time. It’s worth keeping in mind that you have to get in the door and out WITHIN 60 minutes, for me that includes freshening up when you arrive and, if you need to freshen up on your way out the door, you need to do that within the 60 mins as well - it’s not fair or respectful to take extra time for that.  
 
An hour means we often can’t do much in terms of really getting comfortable with each other and for most ladies, you aren’t going to get the very best if they don’t know much about you besides your name and how your day has gone.  

I find, most times, clients want to do MORE (role play, slowly undressing, making sure I get off, try this and that).. and inside that hour it’s often not possible. It puts me in a position to delicately manage the expectations they have and redirect things accordingly. Luckily, I have professional experience on my day job doing stuff like this... and as far as I know, no one has ever felt like they’ve been rushed during a session. But it’s something To be mindful of.  
I had one experience where they guy was so anxious to do x, y, z in the encounter and I told him that an hour wouldn’t be sufficient for that. He came in, hurriedly “freshened up”, and I discovered he wasn’t not at all fresh.... so I had to redirect him to the shower again. He said, “we don’t have time for that” (yup... we don’t! Should’ve done it right the first time)... and he got so upset I became super uncomfortable and had to ask him to leave! These are the kinds of behaviors people start exhibiting when there is not enough time to get the experience they really want after reading all these wonderful things about the provider they decided to see.  

As a provider my opinion is, if you can fit it in your schedule/budget, a first appointment would ideally be 90 mins - 2 hours. It’s enough time to make sure you are sufficiently clean, maybe have a glass of wine together or a small snack if she has them available, chit chat a bit, and run through a nice laundry list of the very exciting stuff you came for. Every so often you may get a less than great date, but that happens at any time interval. Most clients I talk to have said that 90 minutes minimum with new ladies has completely elevated the quality of most experienced they have. Plus, there are many ladies who have their pricing reflect the preference for longer dates, and prioritize them accordingly.  

But as always, you should just go with what is right for you.
 A lot of us can definitely establish intimacy (physical and otherwise) even in 60 minutes if that’s all we have. And there are guys who don’t care at all about chemistry or establishing familiarity. They just want to have fun and get off. That’s fine too.

I can’t speak for everyone but I personally feel that a 90 minute appointment is ideal. Like the lovely ladies above me have stated it gives enough time to get a true first impression without the sense of being rushed. Many of us offer an hour engagement so the best I can suggest is if you feel like there is chemistry you can always inform her that you wish to extend the appointment.

Shorter first session

I totally agree with the OP assessment, as I do the same self questioning and searching. I am also in agreement with the need to have that magical chemistry, for all the stars to align for a first appointment. I used to go to extra lengths, by getting a present or bottle of wine. When I used agencies, I would ask if I could bring a special hot starbucks coffee, or a favorite snack. Then I began to notice all the piles of choclates and half opened bottles of wine, from previous appointments.  

Being burned a few times, by much older pictures, or even someone elses pictures, or photoshopped with that pose that they are hiding a some not so sexy feature like a beer gut. I admit to being gun shy on first dates as well. I have for financial reasons trimmed back to 1 hour appts for first dates. There are no x,y,z expectations of how many positions that can be done in a hour. The expectation is that I will be happy and satisfied when my time is up.  

I don't mind and prefer to freshen up on arrival. I guess I got trained early in the hobby. But I spend several hours prepping and cleaning and shaving prior to any appt. It is easier with an office job, that a mechanic or ditch digger to be clean and not all sweaty dirty.  

Many of us have experienced the one and done scenario, even though there is plenty of time left on the clock. That is the way it used to be back in the olden days of 14th street walkers. I don't mind spending a few minutes upfront getting to know this new date, before the suckin and bangin commences. As long as its not 30 minutes of talk, and then you get the bums rush to hurry up and finish before the next guy is bangin on the door and the phone texts are blowin up her phone. I have had several "not interested in me" types, that I could not wait to head out the door, and never repeat. But I have also had many experiences, where I could not wait to see her again. Those are the ones with gold stars next to their name on P411 OK list. They are truely worth the time and expense.  

There is a happy medium to be found, of course, in time management and expectations. This is not real dating or developing a relationship that leads to marriage. But if you happen to hit it off with someone, you are more inclined to repeat and usually for longer appts.

I prefer 2hrs or more however..

I do have a 1hr rate for the gents who are more comfortable with just an hour or the guy who does not have alot of time.
Sorry you had a bad experience years ago.
Do what works best for you.

Book for an hour and if you want to extend it ask. She might also want and be able to. Then decide after that how long to book future appointments.  
I like to be unrushed. My favorites are 3 hour dinner dates.  
However, I have found myself in situations where I wanted to run lol and couldn’t get away fast enough where an hour was an eternity. Few and far between thankfully!!  

Eden

I find clients booking 90 min and longer meetings with me. But I have seen several one-hour appts with new clients.  You have to go with your gut and also what you can fit into your schedule and budget/play money,  When it comes down to it I think most reputable providers can agree with me.. we  just want you to feel comfortable and for it to be an enjoyable, fun experience for us both. xx  

I generally do 1 hour for the first date, and longer appointments when I repeat.  

A couple times I've done a longer first session, if her 90 min or 2 hour rates were attractive, and if I picked up something from reviews and/or her website that made me pretty sure it was going to be great.

response is to never contact her again and move on to someone else. OR contact her again for another session. If she doesn't respond your instincts were correct.

I usually book one hour the first time but only if she is local or visits regularly.